﻿using System;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Student5.ClassName);
            Console.WriteLine(Student5.Major);
            Student3Info s = new Student3Info();
            s.Name = "小新";
            ///扩展
            string abc = "abc";
            abc.Play();
    
        }
    }
}
